Type pad for typewriters



March7, 1933. L. DENZER TYPE PAD Foia TYPEWRITERS Filed Nov. 23, 1931 Patented Mar. 7, 1933 LUDWIG IDENZER, OF HAMBURG, GERMANY TYPE PAD FOR TYPEWRITEBS Application filed November 23, 1931,'Seria1 No. 576,814, and in Germany March 14, 1931.

The type pads at present in use on typewriters are open to considerable objections consisting, amongst other things, in that special fixing means are necessary for fitting .5 the type pads on the metallic bow, whereas when employing type pads made of felt and the like sinking of the type levers into the ads cannot be avoided.

These objections are not only completely overcome by the invention but a device is produced which avoids the otherwise troublesome vibrating of the type levers when striking and the nected therewith, and in which moreover a dust catcher is provided which protects against the otherwise inevitable soiling of the type levers. v

The type pad according to the invention is characterized substantially by a strip of elasticmaterial provided with a groove serving as dust catcher, said strip having a recess of trapezate cross-section, so that projections are produced which, forming a dovetailed shaped groove, serve for clamping the type pad on the known metallic typewriter bow. The type pad according to the invention is, with the exception of the grooveshaped part thereof, of wedge-shaped crosssection and has a plurality of parallel grooves which are made, for example, in the shape of continuous longitudinal grooves. On the rear side of the type pad a plurality of dampers of any desired cross-section are provided, made of the same material as the type pad itself or of different material.

An embodiment of the invention is illustrated by way of example in the accompanying drawing in which:

Fig. 1 shows the type'pad in top plan view. a

Fig. 2 is a section on line 22 of Fig. 1 showing the type pad fitted on a bow.

Fig. 3 is a cross section on the type pa on line 33 of Fig. 1.

The type pad consists of a strip made of elastic material such as rubber, the upper portion a of said strip being wedge-shaped, whereas the surface directed towards the type levers has several juxtapositioned parallel g longitudinal grooves b.

jamming of the same consection v leaving dove-tailed shaped groove for On the rear side of the strip, where the type pad bears on the metallic bow-0,

several,

for example two or three dampers d are cast in the middle portion designed to prevent the type levers from vibrating when they are struck.

These dampers are of any desired cross-section. The wedge-shaped part a of the type pad serves for colle the ink rubber quently prevents the to the key levers an elastic material tion,

merges into a groove 6,

cting the dust coming from which during erasing and consedust from dropping on the like. The strip of serving as type pad has on are produced. The projections g, h are for example cast-on and serve type pad on the every typewriter,

The curved middle portion fixation means.

for clamping the metallic bow 0 provided on without the aid of special of the metal bow or type bar 0 engages with the recess f and is therefore partly enclosed by the projections g and h. The shape of the above mentioned projections g,

h is chosen so that a dove-tail shaped groove is produced.

The projections g, tail shaped groove may,

h forming the doveinstead of being continuous as shown, be provided only at the ends of the metal strip portion thereof a so that the middle lies freely on the metal bow c. In this manner a very convenient fitting an removal of the type pad according to the invention is attained.

I clalm a strip of surface a groove for catching typewriters, comprising the dust and in its inner surface a recess of trapezate cross said recess a clamping the p writer.

2. A type which the strip projections forming with ad on the bow of the typepadasspecified in claim 1, in

of material is, with the exception of the groove shaped portion thereplurality of par rooves. 3. A. type pa of, of wedge shaped cross-section and has a allel continuous longitudinal d as specified in claim 1 in Which a damper is arranged on the rear side of the elastic strip.

4. A type pad as specified in claim 1 in which on the rear side of the elastic strip sev- 5 eral dampers of any desired cross section and 0f the same material as the type pad are arranged. I V

5. A type pad as specified in claim 1 in which on the rear side of the elastic strip several dampers of any desired cross section andvof diiierent material from that of the type pad are arranged.

In testimony Wherof I affix my signature.

LUDWIG DENZER. 

